In this unit we dived into how electrical systems worked and studied the behavior of charges. We started by demonstrating and everyday situation. We rubbed a balloon on somebody's head and stuck it to a wall. Electrons were taken from the head and added to the balloon which caused a negative charge. And we learned that opposite forces attract. So when putting the balloon on the wall the electrons began to pull on the positive protons on the wall and this caused polarization. The protons and electrons were attracted and were now moved towards where the balloon and wall met.
We then went on to learn about charges and how they power everyday electrical appliances. In a wall outlet there is electric potential energy, the amount of electric potential energy is electric potential and the difference of electric potential energy is what creates current and this difference is called voltage. My podcast was on electric potential/energy and capacitors and here it is
Voltage is measured in volts and out standard for outlets is 120v. The flowing of charges through a wire is called current and is measured in amps. Current goes from a electric potential energy source to a different electric potential energy place. The fluidity in which the current flows through is called resistance and is measured in Ohms. Resistance increases when the wire is longer, wider, or colder. Current is directly proportional to Voltage and indirectly proportional to resistance. Ohm's law represents this by saying I=V/R. There are two ways to wire things, series and parallel. Most appliances are wired in parallel because each appliance draws its own individual charge that way and if one burns out the others stay up, but because this draws more current the system will be hotter. To prevent over heating we use circuit breakers, these are switches that turn off when to much heat is drawn. These circuit breakers are wired in series so it cuts off the whole system when to much heat is drawn. Series is a wiring that has all appliances share the voltage causing less efficient running appliances and when one cuts off they all cut off. Coulomb's Law states k*q1*q2/d^2, which means the closer to objects are to each other the stronger the force they will feel.
In order to create current you can use induction (no touching), conduction(touching), or friction. The most confusing thing we learned this unit was electric fields. Electric fields are charged areas where outside charges become matched with an opposite charge without affecting the inside of the field. Here is a video explaining. https://www.youtube.com/watch?v=laGSICm_agM (No embed available).
We then went on to learn about charges and how they power everyday electrical appliances. In a wall outlet there is electric potential energy, the amount of electric potential energy is electric potential and the difference of electric potential energy is what creates current and this difference is called voltage. My podcast was on electric potential/energy and capacitors and here it is
Voltage is measured in volts and out standard for outlets is 120v. The flowing of charges through a wire is called current and is measured in amps. Current goes from a electric potential energy source to a different electric potential energy place. The fluidity in which the current flows through is called resistance and is measured in Ohms. Resistance increases when the wire is longer, wider, or colder. Current is directly proportional to Voltage and indirectly proportional to resistance. Ohm's law represents this by saying I=V/R. There are two ways to wire things, series and parallel. Most appliances are wired in parallel because each appliance draws its own individual charge that way and if one burns out the others stay up, but because this draws more current the system will be hotter. To prevent over heating we use circuit breakers, these are switches that turn off when to much heat is drawn. These circuit breakers are wired in series so it cuts off the whole system when to much heat is drawn. Series is a wiring that has all appliances share the voltage causing less efficient running appliances and when one cuts off they all cut off. Coulomb's Law states k*q1*q2/d^2, which means the closer to objects are to each other the stronger the force they will feel.
In order to create current you can use induction (no touching), conduction(touching), or friction. The most confusing thing we learned this unit was electric fields. Electric fields are charged areas where outside charges become matched with an opposite charge without affecting the inside of the field. Here is a video explaining. https://www.youtube.com/watch?v=laGSICm_agM (No embed available).
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